Firewall will not start

I noticed earlier, that the firewall on my vps showed as not running. However, I cannot enable it. When trying to enable it, I get:

[root@server ~]# csf -e
csf and lfd are not disabled!

Then when I refresh the page. The firewall is still shown as not running.

I have tried a clean install of the os (Centos 7), followed by reinstalling Centos webpanel, but this has made no difference.

Obviously, I cannot run a server without a firewall. Is there any way to fix this?

is your server openvz?

The host machine is running virtuozzo (as far as i'm aware...cpanel used to report that when I used it). I've rebuilt the OS again, this time to centos 6, followed by reinstalling centos webpanel, and the firewall now starts correctly.

For openvz  in the node your provider should do this ( let's say your vm number is 100)

1. stop the vps from the node by running
vzctl stop  100

2. Enable the module:

vzctl set 100 --netfilter full --save

3. Start VPS:

vzctl start 100

Then every thing will work